diff --git a/.github/workflows/issue-metrics.yml b/.github/workflows/issue-metrics.yml
index a4a7a536e..1dd385d30 100644
--- a/.github/workflows/issue-metrics.yml
+++ b/.github/workflows/issue-metrics.yml
@@ -6,9 +6,9 @@ name: Monthly issue metrics
 #     - cron: '3 2 1 * *'
 on:
   push:
-    branches: ['issue_metrics']
+    branches: [issue_metrics]
   pull_request:
-    branches: ['issue_metrics']
+    branches: [issue_metrics]
 
 permissions:
   contents: read